Orbit and Eye

Question 1

Roof of Orbit

Answer 1

Orbital plate of Frontal bone

Question 2

Lateral Wall of Orbit

Answer 2

zygomatic bone and greater wing of sphenoid

Question 3

Floor of Orbit

Answer 3

Orbital plate of maxilla

Question 4

Medial Wall of Orbit

Answer 4

Frontal process of maxilla, lacrimal bone, orbital plate of ethmoid, body of sphenoid

Question 5

Eyelid

Answer 5

protects eye from injury and light
meet at medial and lateral angles
palpebral fissure- opening

Question 6

Conjunctiva

Answer 6

mucous membrane covering eyelid and surface of eyeball

Question 7

Tarsal Glands

Answer 7

secrete oils substance to prevent overflow of tears

Question 8

Orbital Septum

Answer 8

Fibrous sheath that supports the eyelids

Question 9

Lacrimal Gland

Answer 9

Large orbital and small palpebral parts
located above eyeball
12 ducts

Question 10

Accompanies optic nerve

Answer 10

Ophthalmic Artery

Question 11

Frontal Nerve

Answer 11

divides into supratrochlear and supraorbital nn

Question 12

Lacrimal Nerve

Answer 12

runs along lateral rectus m
joins branch of zygomaticotemporal n
inn lacrimal gland

Question 13

Superior Branch of Oculomotor Nerve

Answer 13

inn superior rectus and levator palpebrae superioris

Question 14

Inferior Branch of Oculomotor N

Answer 14

inn inferior and medial rectus, inferior oblique

Question 15

Ciliary Ganglion

Answer 15

parasympathetic fibers to sphincter pupillae and ciliary m

Question 16

Nasociliary Nerve

Answer 16

divides into anterior ethmoidal and infratrochlear nn

Question 17

Communicating Branch to Ciliary Ganglion

Answer 17

from Nasociliary N

contains sensory fibers

Question 18

Long Ciliary Nerves

Answer 18

from Nasociliary N

sympathetic fibers for dilator pupillae m

Question 19

Posterior Ethmoidal N

Answer 19

supplies ethmoidal and sphenoidal air sinuses

Question 20

Infratrochlear N

Answer 20

inn medial part of upper eyelid and adjacent part of nose

Question 21

Anterior Ethmoidal N

Answer 21

passes thru ant ethmoidal foramen and enters nasal cavity thru the ant cranial fossa
inn part of mucosa and nose

Question 22

Central Artery of Retina

Answer 22

from Ophthalmic A

enters eyeball at optic disc

Question 23

Muscular Branches of Ophthalmic A

Answer 23

supply extraocular mm

Question 24

Ciliary A

Answer 24

from Ophthalmic A

splits into anterior and posterior groups

Question 25

Anterior Group of Ciliary A

Answer 25

enters eyeball near corneoscleral junction

Question 26

Posterior Group of Ciliary A

Answer 26

enters near optic nerve

Question 27

Lacrimal A

Answer 27

supplies lacrimal gland

Question 28

Supratrochlear and Supraorbital AA

Answer 28

supply skin of the forehead

Question 29

Superior Ophthalmic Vein

Answer 29

communicates with facial v

drains into cavernous sinus

Question 30

Inferior Ophthalmic Vein

Answer 30

communicates thru inferior orbital fissure with pterygoid venous plexus
drains into cavernous sinus

Question 31

Fibers for Ciliary Ganglion

Answer 31

preganglionic parasympathetic
from oculomotor
postganglionic leave as short ciliary nn